Re: [Valgrind-users] Porting valgrind.h to win32?

[Tom H. <to...@co...>]

On 18/10/09 02:37, Dan Kegel wrote:

> while the key bit of VALGRIND_DO_CLIENT_REQUEST
> which immediately follows the preamble expands to
>      48 87 db                xchg   %rbx,%rbx
>
> I'm a bit mystified by all the 0x48 prefixes.  I thought
> 0x48 was dec ax ... what's going on there?

It might be "dec ax" in 32 bit code but this is 64 bit code so it's a 
REX prefix, used to access the extra registers.

Tom

-- 
Tom Hughes (to...@co...)
http://www.compton.nu/